Steam generator



June 27, 1933. A. L. WILSON STEAM GENERATOR Filed Feb. 25, 1930 OHOOHUAKGHO ATTORNEY patented June 27, 1933 UNTTE STATES Parana castes AMYUITL. WHISON, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO STANDARD OILDEVELOPMENT COMPANY, A CORPORATION OF DELAWARE STEAM GEN ERATOBApplication filed February 25, 1930. Serial No, 431,234.

This invention relates to improvements in steam generating systems andcomprises the use of a washing device for purifying the steam, togetherwith other features, all of which will be fully understood from thefollowing description, read in connection with the accompanying drawing,in which the figure is a diagrammatic vertical section through thedevice.

In the drawing, reference numeral 1 designates the fire chamber of afurnace which is heatedby flame from a burner'2. The products ofcombustion pass from the fire chamber through chambers 3 and 4 to astack 5. Fresh feed water passes through line 6 and heat exchanger 7 topreheater 8 located in chamber 1. The preheated water is conductedthrough line 9 and valve 10 into a header 11 from which it passesthrough a coil 12 in fire chamber 1. The water is-maintained underpressure in the heating coil by means of the pressure control valve 15,which communicates with the coil through a header 16. The water may bemaintained in the heating coils under a relatively high pressure suchas, for example, 3200 lbs. per square inch.

The water passes through valve 15 into a line 17 at reduced pressure.Line 17 discharges through header 18 into a container 19 for wash waterand below the normal level of the water. The container 19 may bereferred to as a steam washer. The wash water removes the salts andother solid material in the steam formed from the water. Steam escapesfrom the container through a line 20 c and passes through a superheater21 disposed in chamber 3 and is discharged through line 22 to a powerdeveloping machine, such as a turbine, or to refinery processes. Thewash water containing the concentrated salts is conducted from thecontainer 19 through a blow down line 23 and heat exchanger 7 to asuitable place of disposal not shown. A valved exhaust 21 communicateswith the container for use when required.

Fresh feed water may be introduced through line 26 into the container19. and the withdrawal of the water from the container is effectedthrough valve 27, line 28,

pump 29 and valve 30, to the header 11, through which it is injectedinto the heating coil 12. A valved line 31 communicates with line 26 andwith line 9 through a valve 32. A valved line 33 connects line 31 wit-hsteam line 17. A. make-up water line 26 connects line 26 with washer 19.Flow through lines 26 and 31 is controlled by valves 26" and 31respectively.

In the operation of the equipment shown in the figure, valve 10 may beopened and valve 32 closed, feed water passing through line 6, heatexchanger 7, preheater 8, line 9, coil 12, and line 17 into steam washer19. Pressure is reduced at valve 15 from any desired pressure up to 3200pounds square inch I in coil 12 to any desired pressure in washer 19.The steam passes from the washer to superheater 21 and thence via line22 to a turbine or other suitable utilization, for example, according tothe method described in my United States patent application Serial No.431,233 filed of even date herewith.

Make-up water is supplied as required through line 26 to maintain thewater level in washer 19. In this operation valves 26" and 27 are openedand Valve 31' is closed.

Alternatively, valves 10 and 31' may be opened and valves 26", 27 and 32closed. The main feed Water supply is through line 6. Make-up water issupplied separately through line 26, line 31 and the make-up water issupplied as required through branch line 33. Circulation is maintainedby pump 29 takmg suction from washer 19 and discharging through header11 into coil 12, thence into line 17 and back to the washer. Saltsaccumulating in the latter are Withdrawn through line 23.

Various changes may be made within the scope of the appended claims inwhich it is desired to claim all novelty inherent in the invention asbroadly as the prior art permits.

I claim:

1. A boiler system comprising a coil, means for supplying water thereto,means for converting the water in the coil into steam under highpressure, means for receiving under reduced pressure the steamdischarged from the coil and containing a bodyof water, the

steam entering beneath the surface of the water, means for supplyingfresh water to said body, means for taking ofi water therefrom, meansfor taking off steam therefrom,

6 means for superheating said steam, and means disc water from the zone,taking ofl'f steam for efiecting heat exchange between the water passingto the coil and a portion of the water removed from the body of waterreceiving the discharge from the coil.

- 2. A'boiler system com rising a steam generating coil, a steam was erconnected thereto, means for supplying water to the coil, separate meansfor supp ying make-up water to the washer, means for withdrawing watertherefrom and means for withdrawing steam therefrom.

3; A boiler system com rising a steam generating coil a steam was erconnected thereto, means for supplying water to the coil,

separate means for supplying make-up water to the washer, means forwithdrawing water therefrom, means for withdrawing steam therefrom, andmeans for passing the makeup water in part directly into the steamgenerating zone of the boiler.

4. Method of generating steam comprising pming water through a heatedzone in which it is maintained at high pressure, reducing the pressureon the stream leaving said zone,

arging the stream at reduced pressure into a steam washing zone beneaththe surface of a body of water therein, takin off cm the zone,superheating the steam, introducing feed water for the system into theheating zone and adding aseparat/e supgly of make-up water to the bodyof water in t e steam washing zone.

AMYUIT L. WILSON.

